| 摘要 |
<p>The platform has a pivotally attached handle and a foldably attached support arranged at its upper and lower sides, respectively. The handle and support are kinematically connected with each other by a connecting rod. The handle horizontally extends in upper and lower positions of the platform and formed as a one-side lever. The support lies in horizontal position in the lower position and projects vertically downwardly from the platform in the upper position. The lever has an end adapted for gripping by an operating person and another end attached to the platform.</p> |
